Collision Kills 10, Including 5 High-School Students on Charter Bus

A "tremendous fire" that quickly engulfed a bus of high-school students in a Northern California freeway wreck, killing 10 and severely burning many others, left officials grappling with the horrific nature of the crash as they tried to determine its cause.

Five students were among the dead in the head-on collision between the bus and a FedEx tractor trailer Thursday evening. Another 34 people were injured in the crash on...